International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 07 | July 2024
p-ISSN: 2395-0072
www.irjet.net
Review on Earth Air Tube Heat Exchanger Nikhil Krishna faye1, Kartik Pralhad Pinjarkar 2 1UG student Dept of mechanical Engineering at government college of Engineering, India 2UG student Dept of mechanical Engineering at government college of Engineering, India
---------------------------------------------------------------------***--------------------------------------------------------------------exchanger that can capture heat from the ground for heating Abstract - The demands of cooling energy & thermal purposes and dissipate heat to the ground for cooling comfort requirements are rapidly increasing day by day due purposes. Earth tube heat exchanger is a creative way to use to the global warming effect. The temperature of Tropical the geothermal energy to our advantage, both for heating and and Subtropical regions is as high as 50 ℃ in summer, and it cooling inside the living area. Earth tube heat exchanger is as low as below 10 ℃ in winter. So we may utilize the fact required blower to move the air throughout the setup of the that the temperature of the earth at a depth of 2–3 m is ground loop heat exchanger. Heat is extracted from or constant throughout the year irrespective of the season, and rejected to the ground through a buried pipe, through fluid that constant temperature is called earth undistributed flow. This simple setup helps in reducing cost, electricity temperature (EUT) so this may be utilized for heat rejection consumption for the system. This system eliminates the of air in the summer for cooling purpose (heat source) and compressor, condenser, and evaporator cost by simply using heat addition of air in the winter for the heating purpose. geothermal energy. The current setup is developed to explore the possibility of EATHE installation for heating and cooling in this region to There are two major types of earth tube heat exchanger curb the demand for energy Consumption. In the present system. experiment, a setup is established. It consists of PVC/Copper pipes and a blower. To analyze the performance of EATHE of 1)O PEN -TYPE EARTH TUBE HEAT EXCHANGER the current setup, measurement of atmospheric temperature and inside temperature of soil at a depth of 6 feet in summer In the open-type earth tube heat exchanger system, the is done. Calculations of the amount of heat transfer and work air from the atmosphere passes through tubes that are input to the blower were done by applying suitable buried in the ground where the heat transfer between the air thermodynamic formulae and data. Calculation of the and the tube takes place due to temperature differences. coefficient of performance was also done. 2) Closed-type earth tube heat exchanger Key Words: Earth-air heat exchanger, Ambient air, Buried pipes, geothermal, exchanger. In the closed-type earth air heat exchanger system, the air from the room passes through tubes that are buried in 1.INTRODUCTION the ground where the heat transfer between the air and the tube takes place due to temperature differences. With increase in demand of thermal comfort and cooling the use of electricity and energy are increasing day by day. EATHE EFFECTS OF VARIOUS PARAMETERS Due to the limited sources of energy, it is necessary to find out the alternate source of to preserve the conventional fuels 1) Material Effect: In the beginning, EATHE was built using and to save the energy of earth. The best alternatives are steel pipes, but after that, numerous kinds of materials were adopting passive design strategies The earth air heat experimented with. According to research, PVC materials exchangers are considered as an effective replacement for have the same impact. Because of this, PVC may be used in heating or cooling of buildings. Worldwide, it is estimated place of more expensive materials, and the product will last that the residential buildings, offices, and stores consume longer. A slight difference in air temperature at the pipe around 40% of our energy and 70% of our electricity. Heating outlet between copper and PVC may be attributed to the and cooling for residential, commercial, And industrial better conductivity of copper purposes account for a large share of total final energy 2) Effect of Velocity of Air inside Pipe: Researchers tested demand. To lessen the burden on the active systems the impact and found that increasing the air velocity from 2.0 transforming renewable energy into the thermal or electrical to 5.0 decreased the temperature of the air exiting the tube. energy, a necessary first step is to apply the optimal Air contact with the ground is diminished 2.5 times, while combination of passive design strategies, foremost among the convective intensity move coefficient ascends by 2.3 them passive solar design strategies. Geothermal energy is times. To put it another way, the higher the wind speed, the considered a renewable source of energy (never-ending smaller the temperature increases are since the latter impact source of energy). Traditional heating and cooling system is more dominating. At high speeds, the reduced contact time required compressor, condenser, and evaporator setup. results in poor performance. While Earth tube heat exchanger is an underground heat
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